Patent US4722663A successfully refreshed from Google Patents.
US4722663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal-off mechanism for rotating turbine shaft
Assignee: GE Oil and Gas Operations LLC
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Filing: 1986-02-04
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Granted: 1988-02-02
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Expires: 2006-02-04
Abstract
Abstract A seal-off mechanism for preventing migration of working fluid along a turbine shaft which includes a floating seal ring and a shaft shoulder. The seal ring is spring biased against the shaft shoulder. During turbine operation, a pressurized fluid moves the ring away from the shoulder. The pressurized fluid then flows toward the turbine to contain the working fluid. A chamber collects the pressurized fluid and the working fluid for subsequent separation and reuse.
Inventors
- 👤 Judson S. Swearingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:08
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/183; F01D25/186; F01D11/00; F01D11/02; F01D11/04; F01D11/06; F16; F16J; F16J15/00; F16J15/002; F16J15/008; F16J15/16; F16J15/34; Y; Y10; Y10S; Y10S277/00; Y10S277/918
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
168 words
A turbine comprising: a turbine housing having a rotor cavity; a rotor in said cavity; a first bearing fixed in said housing and displaced from said rotor cavity; a shaft rotatably mounted in said bearing, said rotor being fixed to said shaft, said shaft having an annular shoulder facing toward said rotor between said first bearing and said rotor; a seal cavity between said rotor cavity and said first bearing about said shaft in said housing; a bearing cavity in said housing between said first bearing and said seal cavity; a seal ring in said housing about said shaft resiliently biased against said shoulder between said bearing cavity and said seal cavity; and vent means for venting said bearing cavity to a preselected differential pressure of said bearing cavity over said seal cavity, said vent means including a bearing cavity vent for said bearing cavity, a valve controlling said bearing cavity vent and a valve controller actuated by differential pressure between said bearing cavity and said seal cavity.
Claim 2
Dependent Claim
168 words
A turbine comprising: a turbine housing having a rotor cavity; a rotor in said cavity; a first bearing fixed in said housing and displaced from said rotor cavity; a shaft rotatably mounted in said bearing, said rotor being fixed to said shaft, said shaft having an annular shoulder facing toward said rotor between said first bearing and said rotor; a seal cavity between said rotor cavity and said first bearing about said shaft in said housing; a bearing cavity in said housing between said first bearing and said seal cavity; a seal ring in said housing about said shaft resiliently biased against said shoulder between said bearing cavity and said seal cavity; and vent means for venting said bearing cavity to a preselected differential pressure of said bearing cavity over said seal cavity, said vent means including a bearing cavity vent for said bearing cavity, a valve controlling said bearing cavity vent and a valve controller actuated by differential pressure between said bearing cavity and said seal cavity.
Claim 3
Dependent Claim
11 words
The turbine of claim 1 further comprising a seal cavity vent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |